Further inside the magazine in a section describing "a selection of military operations", Isis purports to justfiy its attack on the airliner.

It says: "This was to show the Russians and whoever allies with them that they will have no safety in the lands and airspace of the Muslims, that their daily killing of dozens in Sham through their air strikes will only bring them calamities, and that just as they kill, they will be killed, by Allah's permission."

Elsewhere in the magazine, the group makes a number of references to the attacks on Paris last Friday. It claims that its "eight knights brought Paris down on its knees" and boasts that France declared a sense of emergency. None of the suspected Paris attackers appear to be mentioned by name.

Published online, it also includes an article allegedly written by the captive British journalist John Cantlie, as well as what is thought to be a new picture of the hostage.

And in an image on the final page of the magazine, Isis claims to have executed a Chinese and a Norwegian captive. The two men were described in the previous issue as "for sale".